Twitter Bootstrap sticky sidebar - http://tommyseven.blogspot.com/2012/04/twitter-bootstrap-sticky-sidebar.html

sidebar.css

.sidebar-nav-fixed {
    position:fixed;
    top:100;
    left:0;
}

sidebar.html

<!-- navbar and stuff up here -->

<div class="container-fluid">
  <div class="row-fluid">
    <div class="span3 sidebar-width">
      <div class="well sidebar-nav-fixed">
	What's up, Sidebar?
      </div> <!-- /sidebar -->
    </div> <!-- /span -->
    <div class="span9 span-fixed-sidebar">
      Good place for some content
    </div> <!-- /span -->
  </div> <!-- /row -->
</div> <!-- /container -->

sidebar.js

    // Sticky sidebar w/jQuery
    sidebarwidth = $(".sidebar-width").css('width');
    bodypaddingtop = $(".navbar-fixed-top").css('height');
    sidebarheight = $("body").css('height');
    $('.sidebar-nav-fixed').css('width', sidebarwidth);
    $('.sidebar-nav-fixed').css('height', sidebarheight);
    $('body').css('paddingTop', bodypaddingtop)
    contentmargin = parseInt(sidebarwidth)
    $('.span-fixed-sidebar').css('marginLeft', contentmargin);
    $('.span-fixed-sidebar').css('paddingLeft', 60);

Tried this on CodePen. Does nothing: http://codepen.io/anon/pen/JYBgpo